EP2129506B1 - Method for the production of a sealing assembly, in particular for a motor vehicle, having a sealing element and a support, and such a sealing assembly - Google Patents

Abstract

The invention relates to a method for the production of a sealing assembly (10), in particular for a motor vehicle, having a sealing element (50) and a support (90). According to the method, the support (90) is positioned in an injection molding tool (120) in such a way that a cavity is created in the injection molding tool (120), which cavity determines the shape of the sealing element (50). An injection molding mass is inserted into said cavity in such a way that the sealing element (50) is formed and connected to the support (90). The air which is pressed into the area of the cavity by the insertion of the injection molding mass into the injection molding tool (120) is removed via an air outlet (160). The injection molding mass is vulcanized, and the sealing assembly (10) is removed from the injection molding tool (120). The invention further relates to a sealing assembly (10), in particular for a motor vehicle, having a first sealing element (20) and a support (90) to which the first sealing element (20) is attached. The first sealing element (20) is provided with an air-permeable layer (170).

Description

The present invention relates to a method for producing a sealing arrangement, in particular for a motor vehicle, wherein the sealing arrangement comprises a sealing element and a carrier. Furthermore, the invention relates to such a sealing arrangement.

Motor vehicles often have doors which are equipped both with a raised and lowered and with a fixed window. In order to seal both the fixed window pane and the movable window pane, a web is often provided between these window panes, to which a sealing arrangement for sealing and guiding the movable window pane and for sealing and holding the fixed window pane is attached. Conventionally, a manufacturing method for such a seal arrangement is very expensive. In particular, it has hitherto been necessary to produce such a sealing arrangement in a plurality of successive individual methods. So far, several sealing elements have been manufactured separately and attached to the door during final assembly. Usually, one of the sealing elements is produced by injection molding, wherein a metal carrier is molded. In this case, air bubbles often form on the contact surface of carrier and injection molding compound. Furthermore, it has often been necessary to heat and bend a separate sealing member for the movable windowpane. This often resulted in bulges.

A method and an apparatus for producing a profile tube are in WO 2006/035180 A1 disclosed. The profile hose is made of a thermoplastic material such as PVC, a polyurethane or a synthetic rubber. The profile hose edged and holds a glazing. To produce a material connection between the profile hose and the glazing, the glazing is inserted into an injection mold comprising two mold halves. Additionally, a sealing system is employed in the mold half that includes a plurality of lips that serve to create vents between the glazing and the injection mold. After closing the injection mold, the profile hose is produced by injecting one of the aforementioned materials. In this case, the air present in the cavity of the injection mold can escape via the vent formed by the lips.

WO 97/47456 A1 discloses a window module and a method of manufacturing the window module. The method envisages inserting a carrier and a seal into an injection mold and ejecting it with a polymer, such as EPDM. In this way, a sealing strip is formed, which surrounds the carrier and produces a material connection between a window pane and the seal.

A gasket and method of making a gasket is disclosed WO 2006/067622 A1 , The gasket comprises a divider that divides the window frame of the door of a motor vehicle into two areas, such that a fixed window pane and a movable window pane are received. To produce the separating web, a sealing element is fastened in a form-fitting manner to a carrier and then introduced into a casting mold together with the stationary window pane. Thereafter, a further sealing element is molded.

WO 2008/119706 A1 discloses a sealing arrangement for a motor vehicle and a method for its manufacture. The seal assembly has two seal members made of different materials. The fixed-window sealing first sealing member is made of a first material and is attached to a support by injection molding. The second seal member is disposed after injection molding of the first seal member on the support.

The invention has for its object to provide a method for producing a seal assembly, in particular for a motor vehicle, indicate, so that the seal assembly can be produced in a simple manner while ensuring a reliable and durable connection of sealing element and carrier.

This object is achieved by a method according to claim 1 and a seal arrangement according to claim 6 . Preferred embodiments of the invention are defined in claims 2 to 5 and 7 to 15.

With the method according to the invention, a suitable venting of the air displaced in the cavity during the injection molding process can take place. In this way the formation of air bubbles in the area of the carrier surface is avoided. Thus, a reliable and durable cohesive connection between the sealing element formed by the injection molding compound and the carrier can be achieved. The air is displaced from the area which is filled by the injection molding compound to form the sealing element. The original mold cavity is reduced by the volume of the carrier introduced into the injection mold. As an injection molding an elastomeric material is preferably used.

The air is discharged into a gap, which is located in particular within the injection mold, but not in the region of the cavity. This intermediate space is formed by a further sealing element introduced into the injection mold together with the carrier. This will be explained in more detail below. For this case, therefore, the formation of a vent channel in the mold halves of the injection mold is not required, since the air is displaced within the tool in a range that does not affect the compound of injection molding compound and carrier in particular. Alternatively or additionally, however, such a venting channel can be provided.

In an additional or alternative development of the method, the air escapes at least partially from the injection mold. This can also be done with a formation of the above-mentioned gap.

The air is removed via an air-permeable layer as an air outlet. Such a layer can be formed by simple means and positioned in a simple manner at the desired location. This air permeable layer is provided between the sealing member and the carrier.

More preferably, a mold core which determines the shape of the sealing element is positioned in the cavity. This mandrel is preferably at least partially applied to the carrier in order to achieve a suitable fixation of the carrier in the mold cavity. In a preferred embodiment, the carrier and the cavity or the sealing element extends along a longitudinal direction. In this case, the mold core, which likewise advantageously also extends along this longitudinal direction, can be applied in sections or at points to the carrier. In this way, the carrier is held in addition to the mold core in the injection mold. In addition, a shaped core that is shaped variably along the longitudinal direction when viewed in cross section between the adjoining sections makes it possible to form a suitable channel for receiving the window pane later. Preferably, these contact portions of the mandrel are spaced equidistantly in the longitudinal direction.

As such a mandrel but also a preferably extruded further sealing element can be positioned in the cavity. This further sealing element is fastened to the carrier. The further sealing element is fixed in a form-fitting manner to the carrier before the carrier is introduced into the injection mold. In this way, for example, the sealing element for the movable window pane can already be preassembled and optionally additionally fixed as a result of the injection molding process, for example by partial injection molding or encapsulation. In addition, this sealing profile can be provided with the air-permeable layer and / or also be used to form the space for the displaced air.

In a further preferred development of the method, a holding unit for holding the carrier and / or the sealing element is positioned in the cavity. For example, in the case of a U-shaped sealing element with a receiving channel for the window pane, the holding unit can be positioned in the region of the receiving channel. A holding unit extending along the longitudinal direction of the injection molding tool over the entire length or a holding unit in the form of a slide carried along the longitudinal direction of the injection molding tool during the injection of the injection molding compound can be used.

The seal assembly according to the invention is produced by the method according to the invention and thus makes use of the advantages mentioned above.

Preferably, the air-permeable layer is applied to the carrier. More preferably, the air-permeable layer extends along the longitudinal direction of the carrier, that is along the direction in which the injection molding is carried out. Advantageously, an outer surface of the sealing profile provides the air outlet or the air-permeable layer and is positioned such that the displaced air can be removed via the air outlet or the air-permeable layer.

Advantageously, the air-permeable layer opens on an outer surface of the first sealing element. In this way, the venting can take place in a region between the carrier and the sealing element. In an advantageous embodiment, the air-permeable layer is formed by a certain contour of the outer surface, preferably by a corrugation. old native or additionally, the contour may form at least one venting channel.

Advantageously, the air-permeable layer comprises a flocking, paper, cardboard or fleece. A layer formed from such materials can be produced inexpensively and in a simple manner.

The second sealing element is attached to the carrier. The first sealing element is positively fixed to the carrier and the second sealing element by injection molding materially connected to the carrier.

In a further preferred embodiment, the carrier comprises an outer side and an inner side, wherein the first sealing element is attached to the outside and the second sealing element is attached to the inside. It is also advantageous if the carrier comprises a recess for the positive engagement behind a projection of the second sealing element. Preferably, the carrier extends along a longitudinal direction and the first sealing element has a longitudinally variable cross-section. Preferably, the carrier is H-shaped, L-shaped or U-shaped in cross-section.

Fig. 1

eine Seitenansicht einer Zusammenstellung mehrerer Dich- tungsprofile mit einer erfindungsgemäßen Dichtungsanordnung und einer beweglichen sowie einer feststehenden Fenster- scheibe einer Kraftfahrzeugtür;

Fig. 2

einen Querschnitt gemäß der Linie II-II in Fig. 1 durch eine erste Ausführungsform der Dichtungsanordnung mit zusätzlicher Darstellung eines Spritzgießwerkzeuges;

Fig. 3

ein erstes Dichtungselement der Dichtungsanordnung gemäß Fig. 1 im Querschnitt;

Fig. 4

ein Träger der Dichtungsanordnung gemäß Fig. 1 im Quer- schnitt, und

Fig. 5 bis 8

mehrere Querschnitte analog zu Fig. 2 mit alternativen Ausfüh- rungsformen der Dichtungsanordnung.

The invention will be further explained with reference to the drawings. Here are shown schematically:

Fig. 1

a side view of a compilation of several sealing profiles with a sealing arrangement according to the invention and a movable and a fixed window pane of a motor vehicle door;

Fig. 2

a cross section according to the line II-II in Fig. 1 by a first embodiment of the sealing arrangement with additional representation of an injection mold;

Fig. 3

a first sealing element of the seal assembly according to Fig. 1 in cross-section;

Fig. 4

a carrier of the seal assembly according to Fig. 1 in cross-section, and

Fig. 5 to 8

several cross sections analogous to Fig. 2 with alternative embodiments of the seal assembly.

Fig. 1 shows a view of several sealing profiles of a motor vehicle door. One of these sealing profiles forms the seal arrangement 10 explained in detail below for sealing and guiding a first window pane 12 and for sealing and holding a second window pane 16. The first window pane 12 is, as indicated by the arrow in FIG Fig. 1 indicated, raised and lowered, whereas the second window pane 16 is fixed. In other words, the sealing arrangement 10 forms a kind of holding / sealing web between the two window panes 12, 16.

As from the cross sections according to the Fig. 2 and 5 till 8 To recognize, the seal assembly 10 each have a first extruded sealing member 20, a second injection-molded sealing member 50 and a carrier 90. The first extruded sealing element is separate in Fig. 3 shown. Fig. 4 shows the carrier 90 alone.

From a synopsis of Fig. 1 and one of the Fig. 5 to 8 the mutual arrangement of the seal assembly 10 and the two windows 12, 16 can be seen. Thus, in all the embodiments shown, the first sealing element 20 is used for guiding, holding and sealing the first window pane 12. The second sealing element 50 serves for holding and sealing the second window pane 16. Further, from the cross sections according to FIG Fig. 2 . 5 till 8 can be seen with the indicated positions of the window panes 12, 16, the first window pane 12 has an inner surface 13, an outer surface 14 and an end face 15. Accordingly, the second window pane 16 has an inner surface 17, an outer surface 18 and an end surface 19.

All in the Fig. 2 and 5 till 8 illustrated first sealing elements 20 have a sealing portion 30 and a fixing portion 40. The sealing section 30 comprises in each case three sealing lips 32, 34, 36, which are each provided with a flock 37. Like that Fig. 5 to 8 can be seen, the sealing lip 32 comes in the later mounting position sealingly on the inner surface 13, the sealing lip 34 sealingly against the outer surface 14 and the sealing lip 36 to lie sealingly on the end face 15. The flocking layer 37 allows a friction-reduced guidance of the window pane 12 perpendicular to the plane of the drawing Fig. 5 to 8 ,

The fastening section 40 has a base 42 in the connection region of the sealing section 30. From the base 42 protrude projections in the form of two locking legs 44, 46, which allow a form-liquid fixing of the first sealing member 20 to the carrier 90. In order to be able to provide a certain flexibility for the positive fastening of the first sealing element 20 to the carrier 90, the sealing section 30 has two grooves 38, 39 (see FIG Fig. 3 ). Thus, the two leg-like portions of the sealing portion 30 can be moved towards each other to some extent, so as to allow easier positive fastening. In the in the Fig. 2 and 5 till 8 shown positively locked state of the first seal member 20 on the carrier 90 engage the locking legs 44, 46 in recesses 108, 118 of the carrier 90 and an outer surface 22 of the first sealing member is in the region of the sealing portion 30 on the outside of the carrier 90 at.

The carrier 90 is according to the Fig. 2 and 4 till 8 (see in particular Fig. 4 H-shaped and comprises a central web 92 with a first side surface 94 and a second side surface 96. Further, the carrier 90 comprises two substantially perpendicular to the web 92 connected flanges 100, 110. The from the two flanges 100, 110 and the carrier 92 formed carrier 90 is integrally formed. The flange 100 has an outer side 102, an inner side 104 and an end face 106. The recess 108 is provided in the region of the inside 104. The flange 110 accordingly has an outer side 112, an inner side 114 and an end face 116. The recess 118 is provided on the inner side 114.

The second sealing element 50 produced according to the method to be explained below has an inner surface 56, which is firmly bonded to the flanges 100, 110, and an outer surface 54. The outer surface 54 and the inner surface 56 form an outline surface 52 of the second seal member 50.

Furthermore, the second sealing element 50 comprises a first fastening section 70, which is fastened in a material-locking manner to the flange 100, and a second fastening section 72, which is fastened in a material-locking manner to the flange 110. The second sealing element 50 also has a channel 80 for receiving the second window pane 16. The regions of the second sealing element 50 surrounding the channel 80 thus serve at the same time as a sealing section 60. This sealing section 60 is configured in such a way that the second window pane 16 can be introduced into the channel 80 and is sufficiently sealed and permanently fixed there by the sealing section 60. About the two mounting portions 70, 72, the window pane 16 is held on the carrier 90.

As if from a synopsis of Fig. 2 and 5 till 8 taking into account the respective position of the cross sections (see Fig. 1 ) can be seen, the channel 80 along the longitudinal direction L of the seal assembly 10 has a variable in cross-section elevation 84. This elevation 84 forms a base 82 of the channel 80. Along the longitudinal direction L, the elevation 84 lies completely on the side surface 96 of the carrier 90. In the direction perpendicular to the ridge 92, starting from the side surface 96, the height of the ridge 84 varies along the longitudinal direction L. This shape The survey 84 results from the manufacturing method explained in more detail below.

To produce the seal assembly 10, an injection mold 120 with two tool parts 130, 140 is used (see Fig. 2 ). For the sake of simplicity was in the Fig. 5 to 8 omitted the representation of the injection mold 120 and in particular the tool parts 130, 140. In these embodiments, the injection molding tool 120 and the tool parts 130, 140 are substantially the same as in FIG Fig. 2 trained and arranged. In all embodiments of the injection molding tool 120, the tool parts 130, 140 each have an inner surface 132, 142 and a projection 134, 144. The inner surfaces 132, 142 provide a tool cavity. Like a comparison of Fig. 5 to 8 Tool parts 130, 140 with differently shaped inner surfaces 132, 142 can be used to selectively achieve a material-bonded connection of the second sealing element 50 to the first sealing element 20. The projections 134, 144 may also be grooved (see Fig. 5 ) to avoid expulsion of the displaced air at this point. Furthermore, the injection molding tool 120 comprises a mold core 150 having an outer surface 152 for forming the channel 80 and the elevation 84.

In a first step, the first sealing element 20 is fastened in a form-fitting manner to the carrier 90. For this purpose, the two legs of the sealing portion 30 are slightly pressed together via the grooves 38, 39 and the first sealing element 20 is pressed into the free space formed by the flanges 100, 110 and the web 92. In the final position according to Fig. 2 the outside of the base 42 contacts the first side surface of the web 92 at least in sections, and the two locking legs 44, 46 engage in the recesses 108, 118. In this position, the first sealing element 20 is fixed in a form-fitting manner to the carrier 90.

This assembly is now positioned within the mold cavity 120 in the mold cavity at a predetermined location such that the remaining cavity has the predetermined shape of the second seal member 50 to be made. In other words, the original tool cavity bounded by the inner surfaces 132, 142 is reduced by the volume of the carrier 90 and the first seal member 20. In order to achieve a secured position of the assembly 50, 90, on the one hand, the first sealing element 20 contributes, which with the sealing lips 32, 34 at least partially sealingly against the inner surfaces 132, 142 of the tool parts 130, 140. The two projections 134, 144 of the tool parts 130, 140 also ensure this sealing contact. In order to ensure further fixing of the first sealing element 20 to the carrier 90 and / or the tool parts 130, 140, a holding unit or a slide can alternatively be provided be positioned in the tool cavity and in the in the Fig. 5 to 8 indicated position of the later window pane 12. For this purpose, the holding unit has suitable dimensions, in particular with respect to the width, so that the first sealing element 20 and in particular the sealing portion 30 with the sealing lips 32, 34 sufficiently strong to the outer surfaces 102, 112 and the end faces 106, 116 of the flanges 100, 110 are pressed, so that the injection molding material fills only the predetermined cavity.

In the area between the inner sides 104, 114 and the side surface 96, a mandrel 150 co-determining the shape of a second sealing element 50 is positioned in the injection mold 120 such that the channel 80 can be formed. Like a synopsis of Fig. 2 and 5 till 8 shows, the mandrel 150 along the longitudinal direction L, which corresponds to the advancing direction of the injection molding process, a variable cross section, so that the elevation 84 can be formed. In other words, the mold core 150 along the longitudinal direction L is viewed only in sections or at points on the side surface 96.

This way, on the in Fig. 2 the right side by the positioning of the mold core 150 sufficient support for the carrier 90 and the first sealing member 20 inside the injection mold 120 and on the in Fig. 2 on the left side, sufficient support for the carrier 90 and the first sealing element 20 is achieved by the first sealing element 20.

Subsequently, the existing of an elastomeric material injection molding compound is introduced into the cavity and the second sealing member 50 is formed. The injection molding compound and thus the second sealing element enters into a cohesive connection with the carrier 90. As in the Fig. 5 to 8 In some regions, a cohesive connection can also be made between the second sealing element 50 and the first sealing element 20, for example in the region of the sealing lips 32, 34. Alternatively, however, a cohesive connection of the first sealing element 20 and the second sealing element 50 can be dispensed with.

By introducing the injection molding compound, the air present in the cavity for the second sealing element 50 is displaced with progressive injection of the injection molding compound. In order to be able to remove this air from the region of the cavity to prevent the formation of air bubbles on the outside 102, 112 of the carrier 90, an air outlet 160 is provided.

The air outlet is formed by an air-permeable layer 170. The air permeable layer 170 is provided between the first sealing member 20 and the carrier 90. The outside of the air-permeable layer 170 at the same time forms an outer surface 22 of the first sealing element 20 and bears against the inner sides 103, 114 of the flanges 100, 110. The air-permeable layer 170 is formed in a simple manner and preferably comprises a flocking, a paper or cardboard layer or a fleece. As a nonwoven is especially a fabric into consideration. The flocking can as well as the flocking 37 of the sealing lips 32 to 36 be executed. Depending on the choice of material for the air-permeable layer 170, this layer can be formed in advance during the production of the first sealing element 20, for example by flocking. Alternatively or additionally, when the first sealing element 20 is fastened to the carrier 90, a layer of paper, cardboard or fleece can be inserted between the sealing section 30 and the flange 100 or 110. Such an inserted layer can be easily removed after the injection molding process, but can also remain there.

Via the air outlet 160 thus created, the displaced air can be directed along the longitudinal direction L into an intermediate space 162. This intermediate space 162 is likewise located inside the injection mold 120 and is provided, for example, by the later receiving channel of the first sealing element 20. Alternatively or additionally, the displaced air can escape from the injection mold 120 via a venting channel.

Alternatively or additionally, the air-permeable layer 170 may also be formed by a predetermined contour of the outer surface of the first sealing element 20, for example by corrugation. Such a contour provides at least one venting channel.

After complete introduction of the injection molding compound and formation of the second sealing element 50 along the desired length, the injection molding compound is vulcanized, and the finished sealing arrangement 10 can be removed from the injection mold 120.

As already explained above, the difference between the various embodiments of the sealing arrangements 10 lies in the Figures 2 and 5 till 8 essentially in the form of the second sealing element 50 and its possible connection to the first sealing element 20 Fig. 5 the cohesive connection of the second sealing element 50 to the first Seal member 20 in the region of the sealing lips 32, 34 shaped differently. The sealing lips 32, 34 have on their outer side grooves for engagement with the correspondingly shaped projections 134, 144 of the tool parts 130, 140. Fig. 6 shows a further alternative connection. In Fig. 7 the sealing lips 32, 34 are largely over-injected with the injection molding compound. Thus, an improved attachment of the sealing elements 20, 50 with each other and on the carrier 90 can be achieved. In Fig. 8 the second sealing element has a glued-on panel 74.

The described method for producing the sealing arrangement 10 is characterized in particular by the fact that the two sealing elements 20, 50 can be connected in a simple manner to the carrier 90, so that a complex sealing arrangement 10 for holding and sealing both the movable window pane 12 and the fixed window pane 16 can be produced in a few steps comprehensive method. Since only one operation is required, a reduction in time and personnel expenses is achieved. As a result of the injection molding process, a suitable and permanent attachment of the second sealing element 50 to the support 90 is provided, whereby the removal of the air displaced in the cavity during the injection molding process does not cause blistering on the support 90 and thus an improved and permanent attachment of the second sealing member 50 on the carrier 90 can be achieved. Furthermore, the subsequent assembly of carrier 90 and the sealing elements 20, 50 is not necessary until final assembly. Thus, the seal assembly 10 can already be delivered ready made and mounted in a simple manner on the vehicle door.

LIST OF REFERENCE NUMBERS

10

sealing arrangement

12

first windowpane

13

palm

14

outer surface

15

face

16

second windowpane

17

palm

18

outer surface

19

face

20

first sealing element

22

outer surface

30

sealing section

32

sealing lip

34

sealing lip

36

sealing lip

37

flocking

38

groove

39

groove

40

attachment section

42

Base

44

latching leg

46

latching leg

50

second sealing element

52

outline area

54

outer surface

56

palm

60

sealing section

70

first attachment section

72

second attachment section

74

cover

80

channel

82

reason

84

survey

90

carrier

92

web

94

first side surface

96

second side surface

100

flange

102

outside

104

inside

106

face

108

recess

110

flange

112

outside

114

inside

116

face

118

recess

120

injection mold

130

tool part

132

palm

134

head Start

140

tool part

142

palm

144

head Start

150

mold core

152

outer surface

160

deflation

162

gap

170

air-permeable layer

L

longitudinal direction

Claims (15)

1. Method for the production of a sealing assembly (10), in particular for a motor vehicle, having a first sealing element (20) a second sealing element (50) and a support (90), wherein the method comprises the following steps:

   a. positioning the first sealing element (20) and the support (90) in the cavity of an injection moulding tool (120);

   b. introducing of an infection moulding compound into the cavity in such a way that the second sealing element (50) is formed and is positively bonded to the support (90),
   wherein the air which is pressed into the cavity as the moulding compound is introduced into the moulding tool is removed via an air outlet (160) formed by an air permeable layer (170) located between the first sealing element (20) and the support (90) into an intermediate space (162) between the first sealing element (20) and the support (90);

   c. vulcanising of the moulding compound and

   d. removing of the sealing assembly (10) from the injection moulding tool (120).
2. Method according to claim 1, characterised in that the air is removed at least in part from the intermediate space (162) out of the injection moulding tool (120).
3. Method according to claim 1 or 2, characterised in that a moulding core (150) which determines the shape of the second sealing element (50) is arranged in the cavity.
4. Method according to claim 3, characterised in that the moulding core (150) is arranged to abut against the support (90) at least in sections.
5. Method according to one of the claims 1 to 4 characterised in that a fixation unit (12) is positioned in the cavity for holding the support (90) and/or the sealing element (20) in place.
6. A sealing element, in particular for a motor vehicle, which is produced using the method according to one of the claims 1 to 5, and comprises:

   a first sealing element (20),

   a second sealing element (50) and

   a support (90),

   wherein the first sealing element (20) is fitted positively to the support (90),

   wherein the second sealing element (50) is positively bonded to the support (90) by injection moulding and

   wherein the first sealing element (20) is provided with an air-permeable layer (170) for removing the air.
7. A sealing element according to claim 6, characterised in that the first sealing element (20) has a sealing section (30) and a fastening section (40).
8. A sealing element according to claim 6 or 7, characterised in that the air-permeable layer (170) abuts against the support (90).
9. A sealing element according to claim 8, characterised in that the air-permeable layer (170) issues onto an outer surface (22) of the first sealing element (20).
10. A sealing element according to claim 8 or 9, characterised in that the air-permeable layer (170) is formed by a predetermined contouring of the outer surface (22) of the first sealing element (20), preferably by fluting.
11. A sealing element according to claim 8 or 9, characterised in that the air-permeable layer (170) consists of flocking, paper, cardboard or a felt.
12. A sealing element according to one of the claims 6 to 11, characterised in that the support (90) has an outer side (102,112) and an inner side (104, 114) wherein the first sealing element (20) is arranged on the outer side (102, 112) and the second sealing element (50) on the inner side (104, 114).
13. sealing element according to claim 12, characterised in that the support (90) is provided with a recess (108, 118) into which a projection (44, 46) of the second sealing element (50) engages positively.
14. A sealing element according to one of the claims 6 to 13, characterised in that the support (90) extends in a longitudinal direction (L) and that the first sealing element (20) has a cross-section which changes along its length (L).
15. A sealing element according to one of the claims 6 to 14 characterised in that the support (90) has an H-, L- or U-shaped cross-section.

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